The large number of really intelligent people on this list never ceases to amaze me.
David L. Fisher
Senior Director
Cape Cod Grand Cayman Holdings Ltd. - Cayman
Fisher+Partners Structural Engineers Ltd. - Cayman
372 West Ontario
312.573.1701
312.573.1726 facsimile
312.622.0409 mobile
www.ccgch.com
www.fpse.com
From: Gerard Madden, SE [mailto:gmse4603@gmail.com]
Sent: Monday, June 25, 2007 12:45 PM
To:
Subject: Re: Aluminum Lag Bolts
Thank You Sasha, I appreciate the info and your time!
-g
On 6/25/07, Alexander (Sasha) Itsekson < sasha@enginious-structures.com> wrote:
Sorry about the interrupted message. I don't really know what happened. As I was saying:
Your situation is fairly common in the construction of aluminum frame skylights and curtain walls. Granted these connections are not generally directly exposed to the elements, we normally use Grade 2 fasteners to wood and Grade 5 fasteners to steel. Grade 5 fasteners will exhibit hydrogen embrittlement failures when connecting to aluminum to steel. In your situation it is definitely a good idea to provide for a neoprene washer and caulk all around the connection. But with the contact bearing being so small and with a good caulking job, the galvanic corrosion should not be a problem.
Alexander (Sasha) Itsekson, SE
Enginious Structures, Inc.
Please note our new address, phone and fax number below:
t. 510.272.9999
f. 510.272.9982
www.Enginious-Structures.com
-----Original Message-----
From: Alexander (Sasha) Itsekson [mailto: sasha@enginious-structures.com]
Sent: Sunday, June 24, 2007 11:40 PM
To: seaint@seaint.org
Subject: Re: Aluminum Lag Bolts
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Your following message has been delivered to the list
seaint@seaint.org at 23:39:49 on 24 Jun 2007.
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Gerard,
Your situation is fairly common in the construction of aluminum frame skylights and curtain walls. Granted these connection are not generally directly exposed to the elements but normally we
From: "Gerard Madden, SE" <gmse4603@gmail.com>
To: seaint@seaint.org
Subject: Re: Aluminum Lag Bolts
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Thanks Bob and Chris!
The project is in
knowledge.
I appreciate your help gentlemen!
-gm
--
-gm